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INVESTMENT MANAGEMENT AND OTHER FEES (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2021 | Mar. 31, 2020 | Jun. 30, 2020
U.S. Global Investors Funds [Member] |  |  |  |  |
INVESTMENT MANAGEMENT AND OTHER FEES (Details) [Line Items] |  |  |  |  |
Aggregate Fees Waived and Expenses Borne | $ 153 | $ 141 | $ 554 | $ 407 |
Administrative fee rate |  |  | 0.05% |  | 0.05%
U.S. Global ETFs [Member] |  |  |  |  |
INVESTMENT MANAGEMENT AND OTHER FEES (Details) [Line Items] |  |  |  |  |
Unitary Management Fee, Percentage of Average Net Assets |  |  | 0.60% |  |
Equity Funds [Member] | U.S. Global Investors Funds [Member] |  |  |  |  |
INVESTMENT MANAGEMENT AND OTHER FEES (Details) [Line Items] |  |  |  |  |
Base percentage adjustment, fund performance not within benchmark index | 0.25% |  | 0.25% |  |
Minimum performance to designated benchmark over prior rolling twelve months, percent | 5.00% |  | 5.00% |  |
Fund Clients [Member] |  |  |  |  |
INVESTMENT MANAGEMENT AND OTHER FEES (Details) [Line Items] |  |  |  |  |
Receivables, Net, Current | $ 2,500 |  | $ 2,500 |  | $ 869
Fund Clients [Member] | U.S. Global Investors Funds [Member] |  |  |  |  |
INVESTMENT MANAGEMENT AND OTHER FEES (Details) [Line Items] |  |  |  |  |
Receivables, Net, Current | 400 |  | 400 |  | 187
Fund Clients [Member] | U.S. Global ETFs [Member] |  |  |  |  |
INVESTMENT MANAGEMENT AND OTHER FEES (Details) [Line Items] |  |  |  |  |
Receivables, Net, Current | $ 2,100 |  | $ 2,100 |  | $ 682

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